Malicious PDF — malware analysis report

Static analysis result for SHA-256 b068214da6022e39…

MALICIOUS

PDF

41.4 KB Created: 2020-08-16 16:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32b9f2e0bfe40b4244650eebac55ec16 SHA-1: 114cbc0aa8cd4313964a5426d02fed78401d2cc3 SHA-256: b068214da6022e39535be4e9b832ac08434bd36907aa9cf783d194c1e565ae5d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=cmake++zip+file, which is likely intended to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=cmake++zip+file
    • http://files.geoffgoodsonhorsemanship.com/uploads/1/3/1/6/131607010/fd34d85184.pdf
    • http://files.melissahannahcccslp.org/uploads/1/3/1/4/131438541/jemomivofepafob.pdf
    • http://files.rentalsheets.com/uploads/1/3/0/8/130874539/fewopezejojiwob_fuvevowajizaz_rosoxibe_pipixegag.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/88383494722.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/repojanamikode.pdf
    • https://cdn.shopify.com/s/files/1/0445/3980/5855/files/gulubalisofagikesanim.pdf
    • https://cdn.shopify.com/s/files/1/0433/1261/1481/files/github_commands.pdf
    • https://cdn.shopify.com/s/files/1/0428/7833/7187/files/9481080169.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7484/files/sop_bed_making.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/40923935789.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8661/files/lojufijojikupajipu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2680/files/nolimaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/80669534781.pdf
    • https://cdn.shopify.com/s/files/1/0433/4849/2438/files/wivuvatajisesunimiza.pdf
    • https://cdn.shopify.com/s/files/1/0448/6601/1298/files/flowers_for_algernon_full_play_script.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005de7.bin
a2052e9afa43bd256aefa9b840cc16c359f1d5149e11ebe17ec5b067f89d8fca
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE7 4792 bytes
font_01_sfnt_off00006e30.bin
bb2ff91b619799e2d1dd0ad1f922af3bb552867df6534ef252a69a1b80aa2c42
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E30 13424 bytes